1 files changed, 48 insertions, 0 deletions
diff --git a/src/layers.cpp b/src/layers.cpp
new file mode 100644
index 0000000..8bd9b8f
--- /dev/null
+++ b/src/layers.cpp
@@ -0,0 +1,48 @@
+//
+// Created by m on 7/27/17.
+//
+
+#include "layers.hpp"
+#include "json_helper.hpp"
+#include "util.hpp"
+
+namespace wm {
+
+surface_id_to_layer::surface_id_to_layer(nlohmann::json const &j) {
+   DB(j);
+   if (j["type"] == "range") {
+      this->id_min = get<int>(j["first_surface_id"]);
+      this->id_max = get<int>(j["last_surface_id"]);
+   } else {
+      this->id_min = this->id_max = get<int>(j["surface_id"]);
+   }
+   this->name = j["name"].get<std::string>();
+   this->layer_id = get<int>(j["layer_id"]);
+}
+
+struct result<struct surface_id_to_layer_map> to_surface_id_to_layer_map(
+   nlohmann::json const &j) {
+   DB(j);
+   try {
+      surface_id_to_layer_map stl{};
+      std::transform(
+         std::cbegin(j), std::cend(j),
+         std::inserter(stl.mapping, stl.mapping.end()),
+         [](nlohmann::json const &j) { return surface_id_to_layer(j); });
+      for (auto i : stl.mapping) {
+         if (i.name.empty()) {
+            return Err<struct surface_id_to_layer_map>(
+               "Found mapping w/o name");
+         }
+         if (i.layer_id == -1 || i.id_min == -1 || i.id_max == -1) {
+            return Err<struct surface_id_to_layer_map>(
+               "Found invalid/unset IDs in mapping");
+         }
+      }
+      return Ok(stl);
+   } catch (std::exception &e) {
+      return Err<struct surface_id_to_layer_map>(e.what());
+   }
+}
+
+}  // namespace wm